Device for regulating the elasticity and throw of reciprocating parts.



No. 673,246. Patented June I], 190i.

A. M. STRENGE.

DEVICE FOR BEGULATING THE ELASTIGITY AND THROW 0F REGIPROOATING PARTS.

(Application filed 11m. 15, 1900.

(No Model.)

' UNITED STATES PATENT OFFICE.

AMANDUS MATTHIAS STRENGE, OF HAMBURG, GERMANY.

DEVICE FOR REGULATING THE ELASTICITY AND THROW OF RECIPROCATING PARTS.

SPECIFICATION forming part of Letters Patent N 0. 676,246, dated June11, 1901.

Application filed March 15, 1900. Serial No. 8,808. (No model-l To allwhom it may concern:

Beit known that I, AMANDUS MATTHIAS STRENGE, a subject of the Emperor ofGermany, residing at 23 MagdalenenstrassaHamburg, in the Empire ofGermany, have invented certain new and useful Improvements in Devicesfor Regulating the Elasticity and Throw of Elastically-ReciproeatingMachine Parts, of which the following is a specification.

In all methods hitherto known of elastically connecting reciprocatingmachine partsfor example, the sieves or equivalent parts of sitting,sorting, or transport apparatus or of sand-polishing machines which movebackward and forward with the crank mechanism, by which movement isgiven themthe great disadvantage has been more or less apparent thatwith an increase in the number of strokes or in the loading of theapparatus the strain on the springs employed was considerably increased,and that consequently the said springs then permitted a longer throwthan in the case of the normal number of strokes and normal loading.Experience proves that this circumstance diminishes the working capacityof the apparatus both as regards quality and quantity. Even in the caseof apparatus with spring-bearings the irregular or uneven stroke isnotavoided, because of the changes in the tension of the spring-bearingsand in loading. The course traversed by the elastically reciprocatingpart varies therefore according to the number of strokes and the loadingand to the inertia imparted thereby to such part. This circumstancegreatly interferes with the movement or treatment of the goods inquestion and often affects the apparatus itself.

The main purpose of the regulating device to which the present inventionrelates is to remove the above-mentioned disadvantages.

The object of the device, which is represented in the annexed drawingsin various forms of construction, is attained by constructing orarranging the springs which connect the reciprocating part in questionwith the driving mechanism or other springs in such a manner that theywill only permit a certain length of throw.

In Figure 1 of the annexed drawings the invention is represented in sideelevation as adapted to a so-called transport apparatus, while Figs. 2to 5 show in plan details of the stroke-limitin g device or of theregulating device for the springs in various forms of con struction.

The reciprocating part A in Fig. l is supported by the spring-arms F andis set in backward and forward motion by means of the crank-axle D andconnecting-rod 0. Between the connecting-rod O and the part A the springII is provided, so that the part A can continue its course beyond thestroke of the crank-lever until it is brought up against the abutment G.The motion of the. part A is therefore indirectly arrested by the crankaxle through rod 0. It is different, however,

when a spring with abutments is provided at P, as in Fig. 1, withattachment toapillarU on the base E and the abutments of the springbetween the con necting-rod O and part A are omitted. In this case themotion of the part Ais directly arrested by means of the rod V and thebase E. Like the connecting-springs the springs with regulating devicecan be variously constructed. The springs shown in Figs. 2 to 4 can beadapted to both purposes, while the spring shown in Fig. 5 is intendedspecially for the connection with the base E, the trestles Q and R,carrying the spring, being fixed to the base. In Figs. 2 and 3 thetension of the springs is regulated by means of the screws T, in Fig. 4by means of the nut K, and in Fig. 5 by the rings N and the screw 0. Theregulating of the stroke, however, is effected in Fig. 2 by means of thedraw rod W and in the other figures by means of the screws S. By meansofthis device the throw of the part A can be limited in both directionsto a certain fixed point even with variable load and number of strokes.By altering the tension of the springs and the limit of the strokedifferent varieties of stroke can be produced, and the difference can beproduced in the out or back stroke, 5

For certain purposes the adj Listing d'eiioes will be superfluous if inthe construction a suitable length of stroke is provided.

-I declare that What I claim is- 1. The combination of afreely-reciprocating part, a positive reciprocating driving part, aspring intermediate of said parts, means for adjusting the tension ofsaid spring and abutments for positively limiting the stroke of saidfreely-reciprocating part irrespective of the stroke of the drivingpart.

2. The combination of a reciprocating part A, a reciprocating rod 0driving means for positively reciprocating the latter, a springintermediate of parts A and O and adjustable abntine'nts on one of saidparts A C for limiting the fiexion of said spring.

3. The combination of a freely-reciprocating part, apositively-reciprocating driving part, a spring intermediate of saidparts and separately-adj nstable ab ntnients for limiting the stroke ofsaid freely-reciprocating part independently in each directionirrespective of the stroke of the driving part.

4. The combination of a reciprocating part A, a reciprocating rod 0,means for positively reciprocating the latter, a spring intermediate ofsaid parts A and 0, means for adjusting the tensile power of said springand adjustable abutments on the rod 0 for limiting the flexion of saidspring independently in

